1 /* $NetBSD: itesio_isa.c,v 1.28 2019/07/23 09:38:53 msaitoh Exp $ */ 2 /* Derived from $OpenBSD: it.c,v 1.19 2006/04/10 00:57:54 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 2006-2007 Juan Romero Pardines <xtraeme@netbsd.org> 6 * Copyright (c) 2003 Julien Bordet <zejames@greyhats.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITD TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITD TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * Driver for the iTE IT87xxF Super I/O. Currently supporting 32 * the Environmental Controller to monitor the sensors and the 33 * Watchdog Timer. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: itesio_isa.c,v 1.28 2019/07/23 09:38:53 msaitoh Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/module.h> 43 #include <sys/bus.h> 44 45 #include <dev/isa/isareg.h> 46 #include <dev/isa/isavar.h> 47 48 #include <dev/sysmon/sysmonvar.h> 49 50 #include <dev/isa/itesio_isavar.h> 51 52 #define IT_VOLTSTART_IDX 3 /* voltage start index */ 53 #define IT_FANSTART_IDX 12 /* fan start index */ 54 55 #if defined(ITESIO_DEBUG) 56 #define DPRINTF(x) do { printf x; } while (0) 57 #else 58 #define DPRINTF(x) 59 #endif 60 61 /* 62 * IT87-compatible chips can typically measure voltages up to 4.096 V. 63 * To measure higher voltages the input is attenuated with (external) 64 * resistors. Negative voltages are measured using a reference 65 * voltage. So we have to convert the sensor values back to real 66 * voltages by applying the appropriate resistor factor. 67 */ 68 #define RFACT_NONE 10000 69 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) 70 71 /* autoconf(9) functions */ 72 static int itesio_isa_match(device_t, cfdata_t, void *); 73 static void itesio_isa_attach(device_t, device_t, void *); 74 static int itesio_isa_detach(device_t, int); 75 76 CFATTACH_DECL_NEW(itesio, sizeof(struct itesio_softc), 77 itesio_isa_match, itesio_isa_attach, itesio_isa_detach, NULL); 78 79 /* driver functions */ 80 static uint8_t itesio_ecreadreg(struct itesio_softc *, int); 81 static void itesio_ecwritereg(struct itesio_softc *, int, int); 82 static uint8_t itesio_readreg(bus_space_tag_t, bus_space_handle_t, int); 83 static void itesio_writereg(bus_space_tag_t, bus_space_handle_t, int, int); 84 static void itesio_enter(bus_space_tag_t, bus_space_handle_t); 85 static void itesio_exit(bus_space_tag_t, bus_space_handle_t); 86 87 /* sysmon_envsys(9) glue */ 88 static void itesio_setup_sensors(struct itesio_softc *); 89 static void itesio_refresh_temp(struct itesio_softc *, envsys_data_t *); 90 static void itesio_refresh_volts(struct itesio_softc *, envsys_data_t *); 91 static void itesio_refresh_fans(struct itesio_softc *, envsys_data_t *); 92 static void itesio_refresh(struct sysmon_envsys *, envsys_data_t *); 93 94 /* sysmon_wdog glue */ 95 static bool itesio_wdt_suspend(device_t, const pmf_qual_t *); 96 static int itesio_wdt_setmode(struct sysmon_wdog *); 97 static int itesio_wdt_tickle(struct sysmon_wdog *); 98 99 /* rfact values for voltage sensors */ 100 static const int itesio_vrfact[] = { 101 RFACT_NONE, /* VCORE_A */ 102 RFACT_NONE, /* VCORE_B */ 103 RFACT_NONE, /* +3.3V */ 104 RFACT(68, 100), /* +5V */ 105 RFACT(30, 10), /* +12V */ 106 RFACT(21, 10), /* -5V */ 107 RFACT(83, 20), /* -12V */ 108 RFACT(68, 100), /* STANDBY */ 109 RFACT_NONE /* VBAT */ 110 }; 111 112 static int 113 itesio_isa_match(device_t parent, cfdata_t match, void *aux) 114 { 115 struct isa_attach_args *ia = aux; 116 bus_space_handle_t ioh; 117 uint16_t cr; 118 119 /* Must supply an address */ 120 if (ia->ia_nio < 1) 121 return 0; 122 123 if (ISA_DIRECT_CONFIG(ia)) 124 return 0; 125 126 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 127 return 0; 128 129 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) 130 return 0; 131 132 itesio_enter(ia->ia_iot, ioh); 133 cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8); 134 cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2); 135 itesio_exit(ia->ia_iot, ioh); 136 bus_space_unmap(ia->ia_iot, ioh, 2); 137 138 switch (cr) { 139 case ITESIO_ID8628: 140 case ITESIO_ID8655: 141 case ITESIO_ID8705: 142 case ITESIO_ID8712: 143 case ITESIO_ID8716: 144 case ITESIO_ID8718: 145 case ITESIO_ID8720: 146 case ITESIO_ID8721: 147 case ITESIO_ID8726: 148 case ITESIO_ID8728: 149 case ITESIO_ID8771: 150 case ITESIO_ID8772: 151 ia->ia_nio = 1; 152 ia->ia_io[0].ir_size = 2; 153 ia->ia_niomem = 0; 154 ia->ia_nirq = 0; 155 ia->ia_ndrq = 0; 156 return 1; 157 default: 158 return 0; 159 } 160 } 161 162 static void 163 itesio_isa_attach(device_t parent, device_t self, void *aux) 164 { 165 struct itesio_softc *sc = device_private(self); 166 struct isa_attach_args *ia = aux; 167 int i; 168 uint8_t cr; 169 170 sc->sc_iot = ia->ia_iot; 171 172 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 173 &sc->sc_pnp_ioh)) { 174 aprint_error(": can't map pnp i/o space\n"); 175 return; 176 } 177 178 aprint_naive("\n"); 179 180 /* 181 * Enter to the Super I/O MB PNP mode. 182 */ 183 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 184 /* 185 * Get info from the Super I/O Global Configuration Registers: 186 * Chip IDs and Device Revision. 187 */ 188 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 189 ITESIO_CHIPID1) << 8); 190 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 191 ITESIO_CHIPID2); 192 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 193 ITESIO_DEVREV) & 0x0f); 194 /* 195 * Select the EC LDN to get the Base Address. 196 */ 197 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 198 ITESIO_EC_LDN); 199 sc->sc_hwmon_baseaddr = 200 (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8); 201 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 202 ITESIO_EC_LSB); 203 /* 204 * We are done, exit MB PNP mode. 205 */ 206 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 207 208 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 209 sc->sc_chipid, sc->sc_devrev); 210 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 211 sc->sc_hwmon_baseaddr); 212 213 if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0, 214 &sc->sc_ec_ioh)) { 215 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 216 goto out2; 217 } 218 219 sc->sc_hwmon_mapped = true; 220 221 /* Activate monitoring */ 222 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 223 SET(cr, 0x01); 224 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 225 226 #ifdef notyet 227 /* Enable beep alarms */ 228 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 229 SET(cr, 0x02); /* Voltage exceeds limit */ 230 SET(cr, 0x04); /* Temperature exceeds limit */ 231 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 232 #endif 233 234 /* 235 * Initialize and attach sensors. 236 */ 237 itesio_setup_sensors(sc); 238 sc->sc_sme = sysmon_envsys_create(); 239 for (i = 0; i < IT_NUM_SENSORS; i++) { 240 if (sysmon_envsys_sensor_attach(sc->sc_sme, 241 &sc->sc_sensor[i])) { 242 sysmon_envsys_destroy(sc->sc_sme); 243 goto out; 244 } 245 } 246 /* 247 * Hook into the system monitor. 248 */ 249 sc->sc_sme->sme_name = device_xname(self); 250 sc->sc_sme->sme_cookie = sc; 251 sc->sc_sme->sme_refresh = itesio_refresh; 252 253 if ((i = sysmon_envsys_register(sc->sc_sme))) { 254 aprint_error_dev(self, 255 "unable to register with sysmon (%d)\n", i); 256 sysmon_envsys_destroy(sc->sc_sme); 257 goto out; 258 } 259 sc->sc_hwmon_enabled = true; 260 261 if (!pmf_device_register(self, NULL, NULL)) 262 aprint_error_dev(self, "couldn't establish power handler\n"); 263 264 /* The IT8705 doesn't support the WDT */ 265 if (sc->sc_chipid == ITESIO_ID8705) 266 goto out2; 267 268 /* 269 * Initialize the watchdog timer. 270 */ 271 sc->sc_smw.smw_name = device_xname(self); 272 sc->sc_smw.smw_cookie = sc; 273 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 274 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 275 sc->sc_smw.smw_period = 60; 276 277 if (sysmon_wdog_register(&sc->sc_smw)) { 278 aprint_error_dev(self, "unable to register watchdog timer\n"); 279 goto out2; 280 } 281 sc->sc_wdt_enabled = true; 282 aprint_normal_dev(self, "Watchdog Timer present\n"); 283 284 pmf_device_deregister(self); 285 if (!pmf_device_register(self, itesio_wdt_suspend, NULL)) 286 aprint_error_dev(self, "couldn't establish power handler\n"); 287 288 return; 289 290 out: 291 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 292 out2: 293 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 294 } 295 296 static int 297 itesio_isa_detach(device_t self, int flags) 298 { 299 struct itesio_softc *sc = device_private(self); 300 301 if (sc->sc_hwmon_enabled) 302 sysmon_envsys_unregister(sc->sc_sme); 303 if (sc->sc_hwmon_mapped) 304 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 305 if (sc->sc_wdt_enabled) { 306 sysmon_wdog_unregister(&sc->sc_smw); 307 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 308 } 309 310 return 0; 311 } 312 313 static bool 314 itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual) 315 { 316 struct itesio_softc *sc = device_private(dev); 317 318 /* Don't allow suspend if watchdog is armed */ 319 if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED) 320 return false; 321 return true; 322 } 323 324 /* 325 * Functions to read/write to the Environmental Controller. 326 */ 327 static uint8_t 328 itesio_ecreadreg(struct itesio_softc *sc, int reg) 329 { 330 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 331 return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 332 } 333 334 static void 335 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 336 { 337 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 338 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 339 } 340 341 /* 342 * Functions to enter/exit/read/write to the Super I/O. 343 */ 344 static uint8_t 345 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 346 { 347 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 348 return bus_space_read_1(iot, ioh, ITESIO_DATA); 349 } 350 351 static void 352 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 353 { 354 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 355 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 356 } 357 358 static void 359 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 360 { 361 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 362 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 363 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 364 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 365 } 366 367 static void 368 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 369 { 370 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 371 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 372 } 373 374 375 #define COPYDESCR(x, y) \ 376 do { \ 377 strlcpy((x), (y), sizeof(x)); \ 378 } while (0) 379 /* 380 * sysmon_envsys(9) glue. 381 */ 382 static void 383 itesio_setup_sensors(struct itesio_softc *sc) 384 { 385 int i; 386 387 /* temperatures */ 388 for (i = 0; i < IT_VOLTSTART_IDX; i++) 389 sc->sc_sensor[i].units = ENVSYS_STEMP; 390 391 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 392 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 393 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 394 395 /* voltages */ 396 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 397 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 398 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 399 } 400 401 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 402 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 403 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 404 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 405 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 406 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 407 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 408 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 409 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 410 411 /* fans */ 412 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 413 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 414 415 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 416 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 417 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 418 419 /* all */ 420 for (i = 0; i < IT_NUM_SENSORS; i++) 421 sc->sc_sensor[i].state = ENVSYS_SINVALID; 422 } 423 #undef COPYDESCR 424 425 static void 426 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 427 { 428 int sdata; 429 430 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 431 /* sensor is not connected or reporting invalid data */ 432 if (sdata == 0 || sdata >= 0xfa) { 433 edata->state = ENVSYS_SINVALID; 434 return; 435 } 436 437 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 438 /* Convert temperature to uK */ 439 edata->value_cur = sdata * 1000000 + 273150000; 440 edata->state = ENVSYS_SVALID; 441 } 442 443 static void 444 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 445 { 446 uint8_t vbatcr = 0; 447 int i, sdata; 448 449 i = edata->sensor - IT_VOLTSTART_IDX; 450 451 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 452 /* not connected */ 453 if (sdata == 0 || sdata == 0xff) { 454 edata->state = ENVSYS_SINVALID; 455 return; 456 } 457 458 /* 459 * update VBAT voltage reading every time we read it, to get 460 * latest value. 461 */ 462 if (i == 8) { 463 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 464 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 465 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 466 } 467 468 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 469 470 /* voltage returned as (mV << 4) */ 471 edata->value_cur = (sdata << 4); 472 /* negative values */ 473 if (i == 5 || i == 6) 474 edata->value_cur -= ITESIO_EC_VREF; 475 /* rfact is (factor * 10^4) */ 476 if (edata->rfact) 477 edata->value_cur *= edata->rfact; 478 else 479 edata->value_cur *= itesio_vrfact[i]; 480 /* division by 10 gets us back to uVDC */ 481 edata->value_cur /= 10; 482 if (i == 5 || i == 6) 483 edata->value_cur += ITESIO_EC_VREF * 1000; 484 485 edata->state = ENVSYS_SVALID; 486 } 487 488 static void 489 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 490 { 491 uint8_t mode = 0; 492 uint16_t sdata = 0; 493 int i, divisor, odivisor, ndivisor; 494 495 i = edata->sensor - IT_FANSTART_IDX; 496 divisor = odivisor = ndivisor = 0; 497 498 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 499 /* 500 * Use the Fan Tachometer Divisor Register for 501 * IT8705F and IT8712F. 502 */ 503 divisor = odivisor = ndivisor = 504 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 505 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 506 if (sdata == 0xff) { 507 edata->state = ENVSYS_SINVALID; 508 if (i == 2) 509 ndivisor |= 0x40; 510 else { 511 ndivisor &= ~(7 << (i * 3)); 512 ndivisor |= ((divisor + 1) & 7) << (i * 3); 513 } 514 } else { 515 if (i == 2) 516 divisor = divisor & 1 ? 3 : 1; 517 518 if ((sdata << (divisor & 7)) == 0) 519 edata->state = ENVSYS_SINVALID; 520 else { 521 edata->value_cur = 522 1350000 / (sdata << (divisor & 7)); 523 edata->state = ENVSYS_SVALID; 524 } 525 } 526 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 527 i, sdata, divisor)); 528 if (ndivisor != odivisor) 529 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 530 } else { 531 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 532 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 533 if (mode & (1 << i)) 534 sdata += (itesio_ecreadreg(sc, 535 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 536 edata->state = ENVSYS_SVALID; 537 if (sdata == 0 || 538 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 539 edata->state = ENVSYS_SINVALID; 540 else { 541 edata->value_cur = 1350000 / 2 / sdata; 542 edata->state = ENVSYS_SVALID; 543 } 544 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 545 } 546 } 547 548 static void 549 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 550 { 551 struct itesio_softc *sc = sme->sme_cookie; 552 553 if (edata->sensor < IT_VOLTSTART_IDX) 554 itesio_refresh_temp(sc, edata); 555 else if (edata->sensor >= IT_VOLTSTART_IDX && 556 edata->sensor < IT_FANSTART_IDX) 557 itesio_refresh_volts(sc, edata); 558 else 559 itesio_refresh_fans(sc, edata); 560 } 561 562 static int 563 itesio_wdt_setmode(struct sysmon_wdog *smw) 564 { 565 struct itesio_softc *sc = smw->smw_cookie; 566 int period = smw->smw_period; 567 568 /* Enter MB PNP mode and select the WDT LDN */ 569 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 570 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 571 ITESIO_WDT_LDN); 572 573 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 574 /* Disable the watchdog */ 575 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0); 576 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0); 577 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0); 578 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0); 579 } else { 580 /* Enable the watchdog */ 581 if (period > ITESIO_WDT_MAXTIMO || period < 1) 582 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 583 584 period *= 2; 585 586 /* set the timeout and start the watchdog */ 587 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 588 period >> 8); 589 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 590 period & 0xff); 591 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 592 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 593 ITESIO_WDT_CNF_PWROK); 594 } 595 /* we are done, exit MB PNP mode */ 596 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 597 598 return 0; 599 } 600 601 static int 602 itesio_wdt_tickle(struct sysmon_wdog *smw) 603 { 604 struct itesio_softc *sc = smw->smw_cookie; 605 int period = smw->smw_period * 2; 606 607 /* refresh timeout value and exit */ 608 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 609 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 610 ITESIO_WDT_LDN); 611 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 612 period >> 8); 613 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 614 period & 0xff); 615 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 616 617 return 0; 618 } 619 620 MODULE(MODULE_CLASS_DRIVER, itesio, "sysmon_envsys,sysmon_wdog"); 621 622 #ifdef _MODULE 623 #include "ioconf.c" 624 #endif 625 626 static int 627 itesio_modcmd(modcmd_t cmd, void *opaque) 628 { 629 switch (cmd) { 630 case MODULE_CMD_INIT: 631 #ifdef _MODULE 632 return config_init_component(cfdriver_ioconf_itesio, 633 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 634 #else 635 return 0; 636 #endif 637 case MODULE_CMD_FINI: 638 #ifdef _MODULE 639 return config_fini_component(cfdriver_ioconf_itesio, 640 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 641 #else 642 return 0; 643 #endif 644 default: 645 return ENOTTY; 646 } 647 } 648